时间：2013-11-20 09:43　作者：admin　点击： 次

Rigid couplings are divided into flange couplings, radial key flange couplings, sleeve couplings, clamp couplings and parallel shaft couplings.
The flange coupling consists of two half couplings respectively connected with two shafts with keys to realize the two-shaft connection and transmit torque and motion.Flange couplings are simple in structure, convenient to manufacture, low in cost, reliable in work, simple in assembly, disassembly and maintenance, and large transmission torque, which can ensure high centering accuracy of the two shafts. They are generally used for stable loads. High-speed or high-precision shafting transmission.Flange couplings do not have radial, axial and angular compensation.
All bolts on the flange coupling have the same material, diameter, length, and pre-tightening force. The symmetry center of the bolt group coincides with the centroid of the joint joint surface, and the joint joint surface remains flat after being loaded.
When the bolt is connected and assembled, the nut needs to be tightened. Under the action of the tightening torque, the bolt is not only stretched by the pre-tightening force f to generate tensile stress, but also twisted by the thread friction torque t to generate torsional shear stress, which makes the bolt Under the combined stress state of tension and torsion.When the coupling is working normally, the torque t acts on the joint joint surface. When the ordinary bolt connection with a gap between the bolt rod and the hole wall is used, it is mainly resisted by the friction moment generated between the joint surface after the connection is pre-tightened. Torque t.